Sound cutting out during quiet moments?

I’ve been having this problem for months now. Whenever there is a quiet moment during a movie or video game or something, my TV’s audio (Vizio D series) cuts out, by which I mean that the background noise cuts out abruptly when there is a pause between conversation. Not a significant problem per se, but it’s very annoying. I’ve tried various audio setting combinations but to no avail. 99% of the time, I use my PS4, but it does it through the cable box as well.

I'm not sure what the volume leveling option is. As far as audio options for the TV, it has Surround Sound, Balance, Lip Sync, Digital Audio Out (PCM and Bitstream), Analog Audio Out (Fixed or Variable), and Equalizer. My PS4 has Audio options for Linear PCM, Bitstream Dolby and Bistream DTS. I've tried switching these up to see if it would help but to no avail.

As far as custom settings, I've reset the TV to factory default settings but still experience the issue. With the input options, I only have access to HDMI, though I have an older E series Vizio that doesn't go through this issue.